Why does the HVAC motor only run on high, '96 T&C LXi?

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Fieronut - 16 Nov 2006 22:54 GMT

I have a '96 T&C and the heater/AC fan only runs on high. The other
settings produce NOTHING. It's very frustrating. Where do I start?

TIA
John

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Mike - 16 Nov 2006 23:21 GMT

>I have a '96 T&C and the heater/AC fan only runs on high. The other
> settings produce NOTHING. It's very frustrating. Where do I start?
>
> TIA
> John

Sounds like a bad blower motor resistor.

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Dave Gower - 17 Nov 2006 04:12 GMT

>I have a '96 T&C and the heater/AC fan only runs on high. The other
> settings produce NOTHING. It's very frustrating. Where do I start?

The resister is burnt. When this happens you only have high because that
setting bypasses the resister element. It's on the firewall as I recall in
front of the passenger. Doesn't plug in, you have to solder the wires. As I
remember, it was awkward, the brake cylinder got in the way. Replacement
unit not expensive tho.

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Bill Putney - 17 Nov 2006 11:20 GMT

> I have a '96 T&C and the heater/AC fan only runs on high. The other
> settings produce NOTHING. It's very frustrating. Where do I start?
>
> TIA
> John

As the others have said: blower motor resistor. It may be that the
resistor simply failed on its own, but often, the motor being near its
end of life will overload the resistor and cause it to blow. If the new
resistor blows again within a short time, then you can suspect the motor
itself needs replacing - or measure the curent draw of the motor now and
compare to the specs for it.

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

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Joe - 27 Nov 2006 04:24 GMT

>> I have a '96 T&C and the heater/AC fan only runs on high. The other
>> settings produce NOTHING. It's very frustrating. Where do I start?
[quoted text clipped - 12 lines]
> (To reply by e-mail, replace the last letter of the alphabet in my address
> with the letter 'x')

Since it's a T&C LXI, it may not have resistors. The automatic A/C in
Chryslers uses a "speed controller" that costs $500 where resisters would
cost $10. I'll just stick my neck out and say IF you have automatic a/c
THEN you probably don't even have resistors.

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Ted Mittelstaedt - 27 Nov 2006 08:14 GMT

> >> I have a '96 T&C and the heater/AC fan only runs on high. The other
> >> settings produce NOTHING. It's very frustrating. Where do I start?
[quoted text clipped - 17 lines]
> cost $10. I'll just stick my neck out and say IF you have automatic a/c
> THEN you probably don't even have resistors.

It would be very easy to go to a wrecker, find a blower motor resistor, and
wire it in with an extra switch that is mounted to the bottom of the dash.
The
resistor needs to be in the air stream as the airflow through the plenum
cools it.
Or if you want to get fancy you can build an electronic version here:

http://www.electronickits.com/kit/complete/motor/ck1400.htm

That is what I'd probably do since you can vary the motor speed to the
exact setting you want.

Ted

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philthy - 30 Nov 2006 00:00 GMT

why not just get the blower module instead of the resistor? since theye is bound
to be one there too???

> > >> I have a '96 T&C and the heater/AC fan only runs on high. The other
> > >> settings produce NOTHING. It's very frustrating. Where do I start?
[quoted text clipped - 33 lines]
>
> Ted

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